Cutting device for turning down card cylinder shafts



April 1955 G. G. SHERRILL 2,706,425

CUTTING DEVICE FOR TURNING DOWN CARD CYLINDER SHAFTS Filed Feb. 26, 1951 4 Sheets-Sheet 1 INVENTOR:

650/2 6'. swam/a ATTORNEYS April 19, 1955 G. G. SHERRILL CUTTING DEVICE FOR TURNING DOWN CARD CYLINDER SHAFTS Filed Feb. 26. 1951 4 Sheets-Sheet 2 x INVENTORT 6,50%: 6. S/lfRR/LL.

ATTORNEYS April I955 ca. G. SHERRiLL 2,706,425

CUTTING DEVICE FOR TURNING DOWN CARD CYLINDER SHAFTS Filed Feb. 26, 1951 4 Sheets-Sheet 3 14 3 7 #2 1:1 P 2 1' I 65 7 I03 73.77 p L 1a 102 1 I515 15b INVENTOR:

GEO/76E 61 SHERR/Ll WEM ATTORNEYS April 19, 1955 G. G. SHERRILL CUTTING DEVICE FOR TURNING DOWN CARD CYLINDER SHAFTS 4 Sheets-Sheet 4 Filed Feb. 26, 1951 INVENTOR:

GEORGE G SHERR/LL.

ATTORNEY CUTTING DEVICE FOR TURNENG DQWN CARD CYLENDER SHAFTS George G. Sherrili, Troutmans, N. C. Application February 26, 1951, Serial No. 212,716 4 tClaims. (Cl. 82-4) This invention relates to a turning tool for concentrically turning down a portion of a shaft, such as a card cylinder shaft, and wherein it is not practical to remove the shaft from the particular machine on which it may be disposed.

It is well known that when a rotating shaft which supports a relatively heavy device, such as the main cylinder of a carding machine, is used continuously over a long period of time, the bearings become worn as a result of which the portions of the shaft extending through the bearings become irregularly-shaped 1n cross sect on. Consequently, in order to replace each of the bearings and to also insure that the shaft and the main cylinder will rotate concentrically about the axis of the shaft, it is necessary that the portion of the shaft extend ng through the bearings be perfectly circular in cross-secnon so that a uniform displacement may be effected between the peripheries of the portions of the shaft extending through the bearings and the inner walls of the bearings.

However, in order to turn down the portionsof the shaft which normally extend through the bearings so they may be concentric with the axis of the shaft, it is normally necessary to remove the main cylinder from the carding machine and to, in turn, remove the shaft from the main cylinder. This is an extremely costly, difficult and hazardous operation since the usual main cylinder a carding machine weighs approximately fourteen-hundred pounds and many other parts of the carding machine would have to be removed in order to remove the main cylinder.

For this reason, it frequently happens that the portions of the main cylinder shaft which extend through the bearings are allowed to become worn elliptically-shaped in cross-section before any attempt is made to turn down the shaft or to replace the bearings.

It is therefore the primary object of this invention to provide a shaft facing or turning device compris ng a housing which may be mounted on either of the reduced ends of the main cylinder shaft, since the reduced ends are usually provided to support pulleys for drivmg the shaft, and to provide a cutting tool pro ec tmg beyond the housing and having means associated with the turning device for rotating the cutting tool about the axis of the reduced portion of the shaft so as to cut the Pt;- ripheral face of the bearing portion of the shaft which normally extends through the hearing so this portion of the shaft may be concentric with the axis of the shaft and circular in cross-section.

It is another object of this invention to provide means for supporting the shaft and the corresponding main cylinder of the carding machine during the turmng-down operation and to facilitate removal of the usual bearing from the end of the shaft before the turning device is mounted thereon. F

More specifically, it is an ob ect or this IHVBII'UOH tO provide a shaft refacing or turning device for turning down a peripheral portion of a shaft ad acent a reduced end portion thereof, said device comprising a pair of tubular members including an internal tubular member and an external tubular member which are provided with mating tapered threaded being split so as to be clamped tightly on the reduced end of the shaft as the external tubular member is tightened on the internal tubular member. There is further provided a housing adapted to be concentrically, manually or mechanically rotated on the external tubular surfaces, the internal member 2,706,425 Patented Apr. 19, 1955 ice iember, the housing having a cutter bar extending inwardly therefrom and having a cutting tool in the free end thereof adapted to engage and cut the adjacent portion of the shaft as rotation is imparted to the housing. There is also provided a threaded shaft extending in parallel spaced relation to the housing and having a connection between the outer end of the shaft and the outer end of the housing and there also being provided a mechanical connection between the housing and the threaded shaft and being so arranged that upon rotation of the housing, the threaded shaft will be rotated either continuously or in a step-by-step manner to gradually move the housing therewith inwardly relative to the tubular member on which the housing is mounted so as to cause the cutting tool carried by the cutter bar on the housing to feed lengthwise of the shaft upon each revolution of the housing and the cutting tool to successively remove stock from the face of the shaft which normally extends through the bearing so that this portion of the shaft may be turned down concentrically with the rest of the shaft and perfectly circular in cross-section.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which Figure 1 is an end elevation of a portion of a carding machine showing particularly one end of the main cylinder and frame associated therewith and showing the shaft facing device mounted on the end of the main cylinder shaft;

Figure 2 is a top plan view looking down at the top of Figure l and showing only a portion of the end of the main cylinder and a portion of the carding machine frame associated therewith;

Figure 3 is a fragmentary elevation with parts in section looking substantially along the line 3-3 in Figure 1 and showing a part of the means for supporting the shaft during the facing or turning operation;

Figure 4 is an enlarged fragmentary vertical sectional view through the improved shaft turning device with parts broken away and being taken substantially along the line 4-4 in Figure 1;

Figure 5 is a transverse vertical sectional view through the improved shaft facing or turning device looking substantially along the line 5--5 in Figure 2;

Figure 6 is a view similar to Figure 5 but showing a modified means of transmitting rotation to the threaded shaft upon rotation being imparted to the housing of the device and also showing the housing as though rotated from the position in which it is shown in Figure 5 Figure 7 is a fragmentary top plan view looking down at the top of Figure 6 and omitting the inner portion of the shaftfacing or turning device, that is, the end of the device nearest the main cylinder of the carding machine.

Referring more specifically to the drawings, the numeral 10 designates one of the lower side frames of a carding machine to the upper surface of which an auxiliary or upper side frame 11 is suitably secured, as by screws 12. This lower side frame 10 usually has a bear ing, not shown, secured to the upper surface thereof in which a main cylinder shaft broadly designated at 13 is usually mounted. This bearing is omitted from the drawings because the improved shaft facing or turning device, to be presently described, is adapted to be employed after the bearing, which usually supports the shaft 13, has been removed from the carding machine.

It is preferred that the usual type of hearings or pedestal be replaced with the improved type of bearing shown in my copending application entitled Improved Main Cylinder Shaft Mounting for Carding Machines, Serial No. 212,717 filed February 26, 1951.

The upper frame member 11 has a substantially semicircular outwardly extending flange or projection 15 which is spaced from the inner wall of an opening 15 in the upper side frame member 11 through which the sheet metal covering l? of a master or main cylinder 20 of the carding machine may be observed. The main cylinder 20 has the usual card clothing 22 thereon and opposed ends ofthe main cylinder 20, only one end of which is shown in the drawings, have a hub portion 23 thereon which is fixedly mounted on the enlarged portion 13a of the main cylinder shaft 13. This shaft 13 also has reduced end portions 13b on each end thereof on which the usual driving and idler pulleys are mounted as is well known to those familiar with the art and a bearing portion 13c is provided between the portions 13a and 13!) by means of this invention as will be more fully described. The driving and idling pulleys have been omitted from the drawings.

The upper frame member 11 supports the usual fiat take-up stands (Figure 1) which are suitably secured to the upper frame member 11 as by screws 26, there being four of these flat take-up stands 25 shown in Figure 1. The take-up stands rotatably support flat carrying pulleys 27 over which top fiat chains 30 are adapted to pass, these top fiat chains 30 having a plurality of card clothing covered top flats 31 secured thereto and which extend lengthwise of the main cylinder 2d of the carding machine. As is well known to those familiar with the art, the top flats 31 move with the chains 39 against, or in closely spaced relation to, the card clothing 22 on the main cylinder 26 in a carding operation.

It is well known to those familiar with the art that the usual do'ffer cylinder and other parts, not shown, disposed below the axis of the main cylinder Zil are provided with card clothing or similar material which, upon rotation of the main cylinder 29 rotate in very closely spaced relation to the card clothing 22 on the main cylinder 2 9. Consequently, if the main cylinder is permitted to move to a lower than normal elevation relative to the doifer cylinder, the card clothing thereon will be severely damaged by the doii'er cylinder with the result that the card clothing 22 on the cylinder 20 would have to be replaced.

Replacement of the card clothing 22 is an extremely tedious and costly operation. Therefore, before the usual bearings are removed from the upper surface of the side frame member 10 of the carding machine, in which instance, the bearings are slid off the end of the shaft 13, it is necessary that the shaft 13 be supported in such a mannor as to not only prevent the card cylinder 2%) from moving downwardly by gravity but to also permit the bearings to be easily slid off the shaft13.

To this end there is provided a pair of anchor members 34 and 35, both of which are identical (Figures 1 and 3) and each of which is provided with a slot 36 adapted to fit over the flange 15 projecting from the upper side frame member 11. Each of the anchor members 34 and has a set screw 37 threadably mounted therein which bears against the upper surface of the flange 15 to thus lock the corresponding anchor member 34 or 35 onto the flange 15. Each of the anchor members 34 and 35 also has a r transverse opening 4t? therethrough.

A loop member 41, which is shown as being made of a cable material in Figure 1, extends through the opening 40 in the anchor member 34, opposed ends of the looped cable 41 being suitably spliced, as at 4-2,'to a hook member 43 from which a mating hooked member 45 of a turn buckle broadly designated at 46 depends. The turn buckle 46 also includes an internally threaded tubular member 47 in the lower end of which an eye 50 is threada'oly embedded. The looped end 51 of a cable 52 connected to the eye 5% of the turn buckle 45 and the cable 52 extends downwardly and passes beneath and partially around the corresponding hub portion 23 of the main cylinder 2 and then extends upwardly through a suitable clamp member 53 and then upwardly and passes through the opening 40 in the anchor member 35' and the free end thereof also extends through the clamping member 53 to form a loop at the upper end of the lefthand reach of the cable 52. It is evident that in the event that there is insuificient space between the outer end of the hub 23 of the main cylinder 2% and the usual bearing which supports the shaft 13, the cable 52 will then pass half around the shaft 13 rather than around the hub 23. In either event, the turn buckle 46 could then be manipulated to tighten the cable 52 and to thus support the weight on the shaft 13 so the conventional bearing, not shown, may be removed from the corresponding shaft 13.

After the conventional bearing has been removed from the corresponding end of the shaft 13, the shaft turning or facing device, the housing of which is designated broadly at 60, may then be mounted on the reduced end portion 13b of the shaft 13 in a manner to be presently described.

The housing is of tubular cast construction and, in order that it may be mounted on the reduced end portion 13b of the shaft 13 concentrically with the axis of the shaft 13 and to permit its use on various carding machines when there is a variation in diameter of the reduced end portions 13]) of the shaft 13 on different carding machines, there is provided an inner adaptor sleeve 61 and an outer adaptor sleeve 62. The inner diameter of the inner adaptor sleeve 61 is the same throughout the length of the sleeve 61 and this sleeve 61 is split or slotted throughout its length, as at 63, at one side thereof. This internal sleeve 6i is shown mounted on the reduced end portion 13b of the shaft 13 with the left-hand or inner end thereof, in Figure 4, bearing against the shoulder formed at the juncture of the enlarged and reduced portions 130 and 13b of the shaft 13.

The external surface of the inner adaptor sleeve 61 is provided with tapered threads 64 and the internal surface of the outer adaptor sleeve 62 is provided with mating tapered treads 65. The outer end of the outer adaptor steeve, which extends substantially beyond the outer end of the inner adaptor sleeve 61, does not have internal threads therein but these may be provided if so desired. This outer portion or" the outer adaptor sleeve 62 has a plurality of circularly spaced radially extending bores therein which are provided to be engaged by a suitable spanner wrench or the like for imparting rotation to the outer adaptor sleeve 62.

Now, since the mating threads 64 and 65 are of less diameter at the right-hand ends of the sleeves 61 and 62 than they are at the left-hand ends thereof, in Figure 4, upon turning the external adaptor sleeve 62 in the proper direction, the external sleeve 62 will cause the internal sleeve to bind and thus tightly engage the reduced end portion 33b of the shaft 13 due to the longitudinally extending slot 63 at one side of the internal sleeve 61. Now, the external surface of the external sleeve 62 and the internal diameter of the tubular housing es is such that this {)rouzigtg 61 will rotate concentrically on the tubular mem- In order to adjust the housing 69 so that it may have a smooth running fit on the exterior sleeve 62 without the necessity of grinding the interior of the surface of the tubular housing as to within extremely close tolerances, the tubular housing 653 has a radially extending slot 70 extending substantially the full length thereof and at one side thereof which defines a pair of radially and longitudinally extending projections 71 and 72 on the housing 60. The radially extending projection 72 has a plurality of set screws '73 threadably embedded therein (Figure 4) which bear against the adjacent wall of the projection 71 defined by the slot 79 to hold the adjacent walls of the slot 70 in the desired spaced relation to each other. On the other hand, to tighten these projections 71 and 72 toward each other and to cause the projection 71 to bear snugly against the set screws 73, the projection 72 is 'slidably penetrated by a plurality of screws 74 which are threadably embedded in the projection 71.

The outer surface of the housing 60 remote from the radially extending slot 70 has a longitudinally extending groove 75 therein which is provided to hold a cutter bar 76 in parallel alinement with the axis of the housing 69. The cutter bar 76 is suitably secured in the groove 75 by any suitable means such as screws 77. It will be observed in Figure 2 that the cutter bar 76 extends inwardly substantially beyond the inner end of the housing 60 and has a cutting tool 80 adjustably secured therein, as by a set screw 31, this cutting tool extending inwardly transversely of the axis of the shaft 13. This cutting tool 30 is adjusted in the free end of the cutter bar 76 to the desired depth of cut to be made in the enlarged portion 130 of the shaft 13. The housing 60 and its associated cutting tool 80 are shown in Figure 2 in the position that they will occupy after the shaft 13 has been turned down adjacent the reduced portion 13b, this turned down portion of the shaft being indicated at 130. This area 130 is the portion of the shaft which extends through the conventional bearings and which is turned down so that this area 130 of the shaft may be perfectly round in cross-section and concentric with the axis of the shaft 13 so that this portion of the shaft may be particularly adapted to accommodate the improved bearing structure shown in my said co-pending application.

Now, this tubular housing 6t? may be rotated either mechanically or manually, and manual means are shown in the drawings for transmitting rotation to the housing so. Secured to the outer end of the tubular housing 60. as by screws (Figure 4), is an annular portion 86 of a crank arm 87 which has a suitable handle 90 on the free end thereof which is adapted to be grasped by an operator for transmitting rotation to the housing 60. This annular portion 86 of the crank arm 87 has an inner diameter slightly larger than the inner diameter of the tubular housing 60 and the external diameter of this annular portion 86 is substantially larger than the mean external diameter of the housing 60 so as to retain an enlarged annular end portion 92 of a connecting rod broadly designated at 93 on the outer end of the housing 60 and against an annular projection 93a on the housing 60. This enlarged end of the connecting rod 93 is slidably mounted on the outer end of the housing 50 so as to permit rotation of the housing 60 within this enlarged portion 92 of the connecting rod 93.

The connecting rod 93 extends outwardly or laterally from the enlarged portion 92 thereof and has a boss portion 94 thereon of substantially less diameter than the enlarged end portion 92 and in which one end of a threaded feed shaft 95 is rotatably mounted. This shaft 95 is prevented from endwise movement in the boss portion 94 of the connecting rod 93 by means of a suitable plate or disk 96 suitably secured, as by a screw 97 (Figures 1 and 2) to the outer end of the threaded shaft 95 and is also prevented from having endwise movement in the boss portion 94 of the connecting rod 93 by a collar 100 suitably secured to the shaft 95 by any suitable means such as a set screw 101.

The threaded shaft 95 extends in parallel spaced relation to the axis of the housing 60 and threadably penetrates a threaded block 102 suitably secured, as by screws 103, to an outwardly extending portion 104 of a bracket 105. The bracket 105 extends downwardly as is clearly shown in Figure 1 and is suitably secured, as by screws 106, to the upper surface of the lower frame member 10. It will be noted in Figure 2 that the lower horizontal flange of the bracket 105 has a longitudinally extending slot 107 therein which is slidably or loosely penetrated by the screws 106 and this slot 107 is provided to permit adjustment of the bracket 105 relative to the shaft 13 because the distance from the shaft 13 to the upper surface of the lower frame member may vary on different carding machines.

In order to feed the cutting bit or tool 80 parallel of the axis of the shaft 13 upon rotation being imparted to the housing 60, there are shown in the drawings two forms of means which may be employed for this purpose. In the original form of the invention shown in Figures 1, 2, 4 and 5, a form of star wheel is shown comprising a hub member 110 which is fixedly secured on the threaded shaft 95 by any suitable means such as set screws 111 (Figure 2) and which has a plurality of projections 112 extending radially therefrom, these projections 112 being shown in the form of pins which are suitably secured, as by a pressed fit, in the hub member 110.

These pins or projections 112 are so spaced that alternate pins will be engaged by the projection 72 on the housing 60 with counter-clockwise rotation being imparted thereto while the pins 112 between the alternate pins will be engaged by the cutter bar 76 at the opposite side of the housing 60 to thus transmit two steps in rotation to the threaded feed shaft 95 upon each revolution being imparted to the housing 60. Since the threaded shaft 95 threadably penetrates the block 102 which is supported in fixed relation to the frame of the carding machine, it is evident that rotation of the threaded shaft 95 in one direction will cause the housing 60 along with the cutter bar 76 and cutter tool 80 to move longitudinally of the shaft 13 as rotation is imparted to the housing 60 so as to remove the material from the portion 130 of the shaft 13 as shown in Figure 2.

The projections 71 and 72 and the cutter bar 76 must pass between adjacent projections or pins 112 and therefore the leading edges of the pins are rounded, as at 115 so the projections 71 and 72 and the cutter bar 76 will not strike the ends of the pins 112 as rotation is imparted to the housing 60.

Although a crank arm and handle are shown for manually transmitting rotation to the housing 60, it should be understood that suitable mechanical means may be employed in lieu of the crank arm 86 for this purpose such as replacing the crank arm 86 with a grooved pulley or the like and providing an electric motor supported on the frame 10 or by supporting an electric motor on the other end of the housing and providing an internal gear on the housing with a small gear on the motor meshing with the internal gear on the housing for transmitting rotation to the housing. Since there are many different ways in which rotation may be transmitted to the housing 60 by mechanical means, it is believed that the illustration shown is sutlicient.

In Figures 6 and 7 there is shown a modified means for transmitting rotation to the threaded shaft in lieu of the hub having the pins 112 thereon. In Figures 6 and 7 there is shown an annular gear which encircles the housing 60 and is suitably secured thereon as by a pressed fit and which meshes with a pinion 121 suitably secured on the shaft 95 by any suitable means such as a set screw 122. Since the remaining parts of the shaft turning or facing device shown in Figures 6 and 7 are identical to those shown in Figures 1, 2, 4 and 5, like parts shall bear the same reference characters and a further description of the structure shown in Figures 6 and 7 is deemed unnecessary. It is thus seen that upon rotation being imparted to the housing 60 in Figure 6, like rotation will be imparted to the gear 120 which will, in turn, transmit rotation to the threaded shaft 95. It is evident that a series of intermeshing gears may be interposed between the gear 120 and the pinion 121 in the event that the ratio between the gear 120 and the gear 121 is such that the cutter tool 80 may be fed at too great a speed in proportion to the rate of rotation of the housing 60.

It is thus seen that I have provided means for supporting the shaft 13 while an improved shaft facing or turning device is employed and this improved turning device being so designed as to be easily and quickly adapted to the reduced end portions 131) of the shaft 13 to be supported thereby as rotation is imparted to the housing 60 for turning the portion 13c of the shaft 13 down to the desired diameter. It is evident that this type of facing or shaft turning device will obviate the necessity of removing the shaft 13 and the main cylinder 20 of the carding machine as the portion of the shaft 13 is reduced to the desired diameter so the portion 13c may be perfectly round in cross-section and will also be concentric with the axis of the enlarged portion 13a and the reduced portions 13b of the shaft 13.

In the drawings and specification, there has been set forth a preferred embodiment of the invention and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.

I claim:

1. In a machine having at least one side frame member and also having a shaft extending transversely of the side frame member, the combination of a housing adapted to be rotatably and slidably mounted on the free end of the shaft, a cutter bar carried by said housing and extending substantially beyond the end of said housing and towards the adjacent portion of the shaft, a cutting tool fixed in the cutter bar and extending at right angles to the axis of the shaft and being adapted to penetrate the surface of the adjacent portion of the shaft to a desired depth, manually operable means for imparting rotation to said housing and the cutting tool, means for automatically moving said housing along with the cutter bar and the cutting tool longitudinally of the shaft upon rotation being imparted to the housing whereby the cutting tool will traverse the face of the adjacent portion of the shaft for removing stock therefrom comprising a connecting rod rotatably mounted at one end thereof on said housing, said housing having an annular projection thereon against which said connecting rod is adapted to ride, a threaded shaft rotatably mounted in the connecting rod in spaced parallel relation to the exterior of the housing, a stationary bracket mounted adjacent the threaded shaft, a threaded block mounted on said bracket and being threadably penetrated by said shaft, a driving connection between the housing mounted on the shaft and the threaded shaft for transmitting rotation from the housing to the threaded shaft upon rotation being imparted to the housing whereby said threaded shaft will cause the housing to move longitudinally of said shaft on which the housing is mounted to cause the cutting tool to traverse the periphery of the portion of the shaft adjacent said housing during rotation thereof for removing stock therefrom, said mechanical connection between the housing and the threaded shaft cornprising means surrounding said threaded shaft and being fixed thereto and having a plurality of laterally projecting pins thereon adapted to be successively engaged by the cutter bar upon each revolution being transmitted to the housing to, in turn, transmit step-by-step rotation to the threaded shaft.

2. In an apparatus for turning down a portion of a shaft, said apparatus having a housing adapted to be slidably and rotatably mounted on one end of said shaft, a cutter arm fixed to said housing and extending therefrom in substantially parallel relation with said shaft, a cutter bit carried by said cutter arm for cutting the periphery of said shaft and means for rotating said housing; the combination of a connecting rod rotatably mounted at one end thereof on said housing, a threaded shaft rotatably mounted in the other end of said connecting rod, means restraining said threaded shaft against axial movement in said connecting rod, means restraining said connecting rod from axial movement relative to said housing, a stationary threaded block disposed adjacent said housing and being threadably penetrated by said threaded shaft, said housing having at least one radially extending projection thereon, and a plurality of circularly arranged radially extending pins fixed on said threaded shaft and being so positioned as to be engaged by the projection on said housing during rotation thereof to cause said threaded shaft to rotate in said threaded block, whereby said housing is moved along the shaft and whereby said cutter bit with traverse the corresponding portion of the shaft for removing stock therefrom.

3. In a cutting tool for removing stock from the periphery of a portion of a shaft, said cutting tool including a housing adapted to be rotatably and slidably mounted on said shaft, means carried by the housing for supporting a cutting blade at a point adjacent a given portion of said shaft and spaced from the housing; the combination of a stationary internally threaded block disposed adjacent said housing, a threaded shaft threadably penetrating said block and being disposed in substantially parallel relation to the exterior of said housing and in substantially parallel relation to the axis thereof, a connecting rod rotatably mounted at one end thereof on said housing and being restrained from axial movement on said housing, said threaded shaft being rotatably mounted in the other end of said connecting rod, means restraining said threaded shaft from axial movement relative to the connecting rod, a plurality of circularly arranged laterally projecting pins carried by said threaded shaft, and at least one radially extending projection on said housing adapted to successively engage said laterally projecting pins upon each revolution being transmitted to the housing to, in turn, transmit step-bystep rotation to the threaded shaft whereby said threaded shaft will cause the housing to move longitudinally of said shaft on which the housing is mounted to thus cause the cutting tool to traverse the periphery of the portion of the shaft adjacent said housing during rotation thereof for removing stock therefrom.

4. in a tool for refacing a peripheral portion of a shaft, said tool having a housing adapted to be rotatably and slidably mounted on said shaft, a cutter bar carried by said housing and extending substantially beyond the end of said housing and toward the adjacent portion of said shaft, and a cutting tool fixed in said cutter bar and extending radially inwardly toward the shaft and being adapted to penetrate the surface of the adjacent portion of the shaft for refacing the same; the combination of a connect'ng rod rotatably mounted at one end the"eof on said housing, means restraining said con necting rod from axial movement relative to said housing, a threaded shaft rotatably mounted in the connecting rod in spaced substantially parallel relation to the exterior of the housing, a stationary threaded block mounted adjacent said housing and being threadably penetrated by said shaft, means surrounding said threaded shaft and being fixed thereto, and a plurality of cir cularly spaced laterally projecting pins carried by said last-named means and adapted to be successively engaged by the cutter bar upon each revolution being transmitted to the housing to, in turn, transmit step-bystep rotation to the threaded shaft whereby said threaded shaft will cause the housing to move longitudinally of said shaft on which the housing is mounted to cause the cutting tool to traverse the periphery of the portion of said shaft adjacent said housing for removing stock therefrom during rotation thereof.

References Cited in the file of this patent UNITED STATES PATENTS 511,053 Levin Dec. 19, 1893 512,426 Woodall Jan. 9, 1894 857,242 Johnson June 18, 1907 861,407 Sullivan July 30, 1907 1,314,876 Lang Sept. 2, 1919 2,187,874 Burrows Jan, 23, 1940 2,409,158 Simpson Oct. 8, 1946 

